CN105735027B

CN105735027B - Sheet manufacturing apparatus and sheet manufacturing method

Info

Publication number: CN105735027B
Application number: CN201510977747.7A
Authority: CN
Inventors: 平田祥朋; 村山嘉明
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 2014-12-25
Filing date: 2015-12-23
Publication date: 2020-08-25
Anticipated expiration: 2035-12-23
Also published as: EP3040474B1; JP2016120656A; JP6511803B2; EP3040474A1; CN105735027A; US10407828B2; US20160186379A1

Abstract

The present invention relates to a sheet manufacturing apparatus and a sheet manufacturing method. The properties of the sheet can be altered. The sheet manufacturing apparatus includes a fiber decomposition unit that decomposes fibers in an atmosphere from a raw material containing fibers, a forming unit that forms a sheet from at least a part of the decomposed fiber product subjected to the fiber decomposition treatment by the fiber decomposition unit, a 1 st supply unit that supplies a 1 st paper material to the fiber decomposition unit, and a 2 nd supply unit that supplies a 2 nd paper material to the fiber decomposition unit, wherein at least one of the 1 st paper material and the 2 nd paper material is a paper material having a resin layer.

Description

Sheet manufacturing apparatus and sheet manufacturing method

Technical Field

The present invention relates to a sheet manufacturing apparatus and a sheet manufacturing method.

Background

Conventionally, there is known a paper recycling apparatus for crushing a 4-sized used paper used in offices and the like to decompose fibers and forming the paper with a fiber decomposition product obtained by the fiber decomposition (see, for example, patent document 1).

Patent document 1: japanese patent laid-open publication No. 2012-144819

Disclosure of Invention

However, in the above apparatus, since the raw material to be supplied is one kind (only used paper), there is a problem that the characteristics of the produced paper cannot be changed.

The present invention has been made to solve at least part of the problems described above, and can be implemented as the following modes or application examples.

(application example 1) the sheet manufacturing apparatus according to the present application example is characterized in that: the paper material comprises a fiber decomposition part for decomposing fibers of a raw material containing fibers in the atmosphere, a forming part for forming a sheet by using at least a part of the fiber decomposition product subjected to the fiber decomposition treatment in the fiber decomposition part, a 1 st supply part for supplying a 1 st paper material to the fiber decomposition part, and a 2 nd supply part for supplying a 2 nd paper material to the fiber decomposition part, wherein at least one of the 1 st paper material and the 2 nd paper material is a paper material having a resin layer.

According to this configuration, since the paper material having the resin layer is used for forming the sheet, the properties of the sheet can be changed without using a functional additive.

(application example 2) the sheet manufacturing apparatus according to the application example is characterized in that: the paper material having a resin layer is a water-insoluble paper material.

According to this configuration, the density of the sheet can be reduced by mixing the water-insoluble paper material having the resin layer.

(application example 3) the sheet manufacturing apparatus according to the application example is characterized in that: the paper material having a resin layer is a release paper comprising cellophane.

According to this configuration, the density of the sheet can be reduced by mixing the cellophane. Further, the release paper in a roll form after the label is peeled can be directly attached to a supply section of the sheet manufacturing apparatus and reused.

(application example 4) the sheet manufacturing apparatus according to the application example is characterized in that: the paper feeding device is provided with a control part capable of changing the feeding amount of the 2 nd paper relative to the feeding amount of the 1 st paper.

With this configuration, the density, strength, texture, and the like of the sheet can be changed.

(application example 5) the sheet manufacturing method according to the present application example is characterized in that: a sheet is formed by decomposing fibers of a raw material containing fibers in the air and using at least a part of the decomposed fibers after the decomposition treatment, and the fibers are decomposed by supplying a 1 st paper and a 2 nd paper, at least one of the 1 st paper and the 2 nd paper being a paper having a resin layer.

Drawings

Fig. 1 is a schematic diagram showing the structure of a sheet manufacturing apparatus.

Fig. 2 is a schematic diagram showing the configuration of the supply unit.

Fig. 3 is a schematic diagram showing a configuration of a supply unit according to modification 1.

Description of the symbols

1 … sheet manufacturing device, 2 … control part, 10, 11 … supply part, 10a … 1 st supply part, 10b, 10c … 2 nd supply part, 20 … rough crushing part, 30 … fiber decomposition part, 40 … classification part, 50 … screening part, 60 … additive input part, 70 … accumulation part, 90 … intermediate conveying part, 110 … pressing part, 120 … heating pressing part, 130 … cutting part, 160 … stacking part, 36331 331 … 1 st sensor, 332 … nd 2 sensor, 361 … th sensor 4 st sensor 362 … th sensor.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the dimensions of each member and the like are shown to be different from the actual dimensions for making each member and the like a recognizable size.

First, the configuration of the sheet manufacturing apparatus will be described. The sheet manufacturing apparatus is based on a technology of forming a raw material (defibrated material) Pu such as a virgin pulp sheet and/or waste paper into a new sheet Pr, for example. The sheet manufacturing apparatus according to the present embodiment includes a fiber decomposition unit configured to decompose fibers of a raw material including fibers in an atmosphere, a forming unit configured to form a sheet from at least a part of a decomposed fiber product subjected to a fiber decomposition process in the fiber decomposition unit, a 1 st supply unit configured to supply a 1 st paper material to the fiber decomposition unit, and a 2 nd supply unit configured to supply a 2 nd paper material to the fiber decomposition unit. In the device, at least one of the 1 st paper and the 2 nd paper is a paper having a resin layer. The following specifically describes the structure of the sheet manufacturing apparatus.

Fig. 1 is a schematic diagram showing the configuration of a sheet manufacturing apparatus according to the present embodiment. As shown in fig. 1, the sheet manufacturing apparatus 1 of the present embodiment includes a supply section 10, a fiber decomposition section 30, a classification section 40 and/or a screening section 50 constituting a forming section, an additive input section 60, a stacking section 70, a heating and pressing section 120, and the like. The controller 2 controls these components. The control unit 2 is, for example, an MPU (micro processor unit) and/or a PC (personal computer), and includes an input/output unit, a storage unit, a processing unit, and/or the like.

The supply unit 10 supplies paper material as a raw material containing fibers to the fiber decomposition unit 30. In the present embodiment, the paper material is supplied to the rough crush section 20 and is supplied to the fiber decomposition section 30 through the rough crush section 20. The feeding unit 10 of the present embodiment includes a 1 st feeding unit 10a for feeding a 1 st paper material and a 2 nd feeding unit 10b for feeding a 2 nd paper material. The detailed configuration of the supply unit 10 will be described later.

The rough crushing section 20 cuts the fed used paper Pu into pieces of paper of several centimeters square. The rough crush portion 20 includes a rough crush blade 21, and is configured to widen the cutting width of the blade of a general shredder. This enables the fed used paper Pu to be easily cut into paper pieces. The cut coarse paper is supplied to the fiber decomposition unit 30 through the pipe 201.

The fiber decomposition unit 30 decomposes the material containing the fibers in the atmosphere (air). Specifically, the fiber decomposition unit 30 includes a rotating blade (not shown) that rotates, and decomposes the fibers that are supplied from the coarse crushing unit 20 and are decomposed into fibers in a fibrous form. In the present application, the object that is defibrated by the defibrating part 30 is referred to as a defibrated material, and the object that has passed through the defibrating part 30 is referred to as a defibrated material. The fiber decomposition unit 30 of the present embodiment decomposes fibers in the air in a dry manner. By the fiber decomposition process of the fiber decomposition unit 30, the printed ink and/or carbon powder, a coating material to paper such as a feathering prevention material, and the like become fine particles (hereinafter, referred to as "ink particles") of several tens of μm or less and are separated from the fibers. Thus, the fiber decomposition product coming out of the fiber decomposition portion 30 is fibers and ink particles obtained by decomposing the fibers of the paper sheet. The rotary blade rotates to generate an air flow, and the fiber after fiber decomposition is carried in the air to the classifying portion 40 through the pipe 202. In addition, the fiber decomposition unit 30 may be provided with: and an air flow generating device for generating an air flow for transporting the fiber after fiber decomposition to the classifying portion 40 through the pipe 202.

The classifying portion 40 classifies the introduced introduction by the airflow. In the present embodiment, the fiber decomposition product as the introduction product is classified into ink particles and fibers. The classifying portion 40 can classify the conveyed airflow of the fiber decomposition product into ink particles and fibers by applying a cyclone separator, for example. Instead of the cyclone separator, another type of air-flow classifier may be used. In this case, as the air-flow type classifier other than the cyclone separator, for example, an elbow ejector, a vortex separator, or the like can be used. The air-flow classifier generates a swirling air flow, performs separation and classification by a difference in centrifugal force depending on the size and density of the fiber decomposition product, and can adjust the classification point by adjusting the speed of the air flow and the centrifugal force. This can be divided into relatively small ink particles having a low density and fibers having a large density.

The classifying portion 40 of the present embodiment is a cyclone separator of a tangential input type, and includes an inlet 40a for introducing an introduced material from the fiber decomposing element 30, a cylindrical portion 41 to which the inlet 40a is attached along a tangential direction, a conical portion 42 connected to a lower portion of the cylindrical portion 41, a lower outlet 40b provided at a lower portion of the conical portion 42, and an upper exhaust port 40c for discharging powder provided at an upper center of the cylindrical portion 41. The conical portion 42 has a diameter that decreases toward the vertical lower side.

In the classification treatment, the airflow carried by the fiber decomposition product introduced from the inlet 40a of the classification section 40 is changed to circular motion in the cylinder section 41 and the conical section 42, and a centrifugal force acts to classify the fiber decomposition product. The fibers larger in size and higher in density than the ink particles move toward the lower outlet 40b, and the ink particles smaller in size and lower in density are discharged as powder together with air toward the upper outlet 40 c. Then, the ink particles are discharged from the upper air outlet 40c of the classifying portion 40. The discharged ink particles are collected in the receiving portion 80 through a pipe 206 connected to the upper air outlet 40c of the classifying portion 40. On the other hand, the fraction including the fibers classified from the lower outlet 40b of the classification section 40 through the pipe 203 is transported in the air toward the screening section 50. The air flow during classification may be fed from the classifying portion 40 to the screening portion 50, or the air flow may be fed from the upper classifying portion 40 to the lower screening portion 50 by gravity. In addition, a suction portion or the like for efficiently sucking the short fiber mixture from the upper exhaust port 40c may be disposed in the upper exhaust port 40c of the classifying portion 40, the pipe 206, or the like. Grading is not reliably graded with a certain size and/or density as a boundary. Also, the separation into fibers and ink particles is not reliable. Even among the fibers, relatively short fibers are discharged from the upper vent 40c together with the ink particles. Even among the ink particles, the ink particles are relatively large and discharged together with the fibers from the lower outlet 40 b.

The screening section 50 screens the classified material (fiber decomposition material) including the fibers classified by the classifying section 40 by passing the classified material through a screen section 51 having a plurality of openings. Further, specifically, the fractionated matter including the fibers fractionated by the fractionation section 40 is screened into the passage passing through the opening and the residue not passing through the opening. The screening section 50 of the present embodiment includes a mechanism for dispersing the classified material in the air by a rotational motion. The passage passing through the opening by the screening in the screening section 50 is conveyed from the passage conveying section 52 to the deposition section 70 side through the pipe 204. On the other hand, the residue that has passed the screen of the screen section 50 without passing through the opening is returned to the fiber decomposition section 30 as a material to be decomposed into fibers again through the pipe 205. Thus, the residue is not discarded but reused (reused).

The passage passing through the opening by the screening section 50 is transported to the deposition section 70 in the air through the pipe 204. The conveyance from the screening section 50 to the stacking section 70 may be performed by a blower not shown that generates an air flow, or may be performed by gravity conveyance from the screening section 50 located above to the stacking section 70 located below. An additive charging section 60 for adding an additive such as a binder resin (for example, a thermoplastic resin or a thermosetting resin) to the transported passing object is provided between the sieving section 50 and the deposition section 70 in the pipe 204. As the additive, for example, a flame retardant, a whitening agent, a sheet force enhancer and/or a sizing agent, an absorption regulator, an aromatic agent, a deodorant, and the like may be added in addition to the binder resin. These additives are stored in the additive storage portion 61 and are introduced from the inlet 62 by an introduction mechanism not shown.

The deposition part 70 may deposit a material containing fibers, and at least a part of the fiber decomposition product decomposed by the fibers of the fiber decomposition part 30 may be deposited in the air. Specifically, the deposition unit 70 is formed by depositing a material including fibers and/or a binder resin fed from the pipe 204 to form a web (web) W, and includes a mechanism for uniformly dispersing the fibers in the air. The deposition unit 70 has a moving unit that deposits the fiber decomposition product as a deposition (web W) while moving. The moving section of the present embodiment includes a tension roller 72 and an endless mesh belt 73 for forming meshes stretched by the tension roller 72. Then, the mesh belt 73 is rotated (moved) in one direction by at least 1 of the tension rollers 72 rotating. The web W according to the present embodiment is a configuration of an object including fibers and a binder resin. Therefore, the web is shown even when the web is changed in shape such as dimension during heating, pressurizing, cutting, and/or conveying.

First, as a mechanism for uniformly dispersing the fibers in the air, a forming drum 71 in which the fibers and the binder resin are fed is disposed in the deposition section 70. Further, by rotationally driving the forming drum 71, the binder resin (additive) can be uniformly mixed in the passing material (fiber). A screen (screen) having a plurality of small holes is provided on the forming drum 71. Further, by rotationally driving the forming drum 71, the binder resin (additive) can be uniformly mixed in the passing substance (fiber), and the fiber passing through the small hole and/or the mixture of the fiber and the binder resin can be uniformly dispersed in the air.

Below the forming drum 71, a mesh belt 73 is disposed. Further, a suction device 75 as a suction portion for generating an air flow directed vertically downward is provided vertically below the forming drum 71 with the mesh belt 73 interposed therebetween. The suction device 75 can suck the fibers dispersed in the air onto the mesh belt 73.

The fibers and the like passing through the small-hole mesh plate of the forming drum 71 are accumulated on the mesh belt 73 by the suction force generated by the suction device 75. At this time, by moving the mesh belt 73 in one direction, a mesh W including fibers and a binder resin and stacked in a long shape can be formed. The dispersion from the forming drum 71 and the movement of the mesh belt 73 are continuously performed, whereby a continuous web W in a belt shape is formed. The mesh belt 73 may be made of metal, resin, or nonwoven fabric, and may be any material as long as fibers can be deposited and an air flow can be passed through. If the pore diameter of the mesh belt 73 is too large, the fibers enter between the meshes and become irregularities when the web W (sheet) is formed, while if the pore diameter of the mesh is too small, it is difficult to form a stable air flow by the suction device 75. Thus. Preferably: the pore diameter of the mesh is appropriately adjusted. The suction device 75 can be configured by forming a closed box having a window of a desired size under the mesh belt 73 and sucking air from outside the window to make the inside of the box a negative pressure compared with the outside air.

The web W formed on the mesh belt 73 is conveyed in the conveying direction (a blank arrow in the figure) by the rotation movement of the mesh belt 73. An intermediate conveyance section 90 as a peeling section is disposed above the mesh belt 73. The web W is peeled off from the mesh belt 73 by the intermediate conveying section 90 and conveyed to the pressing section 110 side. That is, the apparatus has a peeling section (intermediate conveyance section 90) that peels the deposit (web W) from the moving section (mesh belt 73), and can convey the peeled deposit (web W) to the pressing section 110. The intermediate conveyance unit 90 is configured to be able to convey the web W while sucking the web W vertically upward (in a direction in which the web W is separated from the mesh belt 73). The intermediate conveyance section 90 is disposed apart from the mesh belt 73 vertically upward (in a direction perpendicular to the surface of the web W), and is disposed apart from the mesh belt 73 partially downstream in the conveyance direction of the web W. The conveyance section of the intermediate conveyance unit 90 is a section from the tension roller 72a on the downstream side of the mesh belt 73 to the pressing unit 110.

The intermediate conveyance section 90 includes a conveyance belt 91, a plurality of tension rollers 92, and a suction chamber 93. The conveyor belt 91 is an endless mesh belt stretched by stretching rollers 92 to form meshes. Then, the conveyor belt 91 is rotated (moved) in one direction by at least 1 of the tension rollers 92 rotating.

The suction chamber 93 is disposed inside the conveyor belt 91, has a hollow box shape having a top surface and 4 side surfaces contacting the top surface, and has an open bottom surface (a surface facing the conveyor belt 91 located below). The suction chamber 93 includes a suction portion for generating an air flow (suction force) in the suction chamber 93. Then, the suction portion is driven to suck the internal space of the suction chamber 93, so that air flows in from the bottom surface of the suction chamber 93. This generates an air flow directed upward of the suction chamber 93, and the web W can be sucked from above the web W and sucked onto the conveyor belt 91. The conveyor belt 91 is rotated and moved (revolved) by the tension roller 92, and can convey the web W toward the pressing portion 110. Further, since the suction chamber 93 is partially overlapped with the mesh belt 73 when viewed from above and is disposed at a position on the downstream side not overlapped with the suction device 75, the mesh W on the mesh belt 73 can be peeled off from the mesh belt 73 at a position facing the suction chamber 93 and sucked on the conveyor belt 91. The tension roller 92 rotates the conveyor belt 91 while moving at the same speed as the mesh belt 73. By making the speed the same, it is possible to prevent: if there is a difference in the speed between the mesh belt 73 and the conveyor belt 91, the web W is pulled and broken, buckling.

The pressurizing unit 110 is disposed downstream of the intermediate conveying unit 90 in the conveying direction of the web W. The pressing section 110 includes a pair of pressing

rollers

111 and 112, and presses the web W being conveyed. For example, the web W is pressed by the pressing section 110 so that the thickness of the web W formed in the stacking section 70 is about 1/5 to 1/30. This can improve the strength of the web W.

The heating and pressing unit 120 is disposed downstream of the pressing unit 110 in the conveying direction of the web W. The heating and pressing unit 120 heats and presses the web W as a deposit deposited in the deposition unit 70. The heating and pressing section 120 bonds the fibers included in the web W to each other via the binder resin. The heating and pressing section 120 of the present embodiment includes a pair of

heating rollers

121 and 122. A heating member such as a heater is provided in the center of the rotation shaft of the

heating rollers

121 and 122, and the web W is passed between the pair of

heating rollers

121 and 122, whereby the web W being conveyed can be heated and pressurized. Further, the web W is heated and pressed by the pair of

heating rollers

121 and 122, so that the binder resin is melted and easily entangled with the fibers, and the fiber interval is shortened and the contact point between the fibers is increased.

As the cutting unit 130 that cuts the web W, a 1 st cutting unit 130a that cuts the web W along the conveying direction of the web W and a 2 nd cutting unit 130b that cuts the web W in a direction intersecting the conveying direction of the web W are arranged on the downstream side in the conveying direction of the heating and pressing unit 120. The 1 st cutting unit 130a is, for example, a slitter that cuts the web W at a predetermined cutting position in the conveying direction. The 2 nd cutting unit 130b is, for example, a rotary cutter, and cuts the continuous web W into a single sheet along a cutting position set to a predetermined length. Thereby, a sheet Pr (web W) of a desired size is formed. The cut sheets Pr are loaded on the stack 160 and the like. Further, the following may be adopted: the web W is continuously wound by the winding roll without being cut. As described above, the sheet Pr can be manufactured in the sheet manufacturing apparatus 1.

The sheet Pr according to the above embodiment mainly includes: a sheet-like object made of a material including fibers such as waste paper and/or pure pulp. However, the present invention is not limited to this, and may be plate-shaped and/or mesh-shaped (and/or have a concave-convex shape). The raw material may be plant fibers such as cellulose, chemical fibers such as PET (polyethylene terephthalate) and polyester, and animal fibers such as wool and silk. In the present application, the sheet is classified into paper and nonwoven fabric. The paper includes a thin sheet form and the like, and includes recording paper and/or wallpaper for writing and/or printing, wrapping paper, colored paper, drawing paper and the like. The nonwoven fabric is a material having a thickness and/or strength lower than those of paper, and includes nonwoven fabric, fiber board, tissue paper, kitchen paper, cleaning cloth, filter cloth, liquid absorbing material, sound absorbing material, cushioning material, pad, and the like.

In the above embodiment, the waste paper mainly refers to printed paper, but if an object formed as paper is used as a raw material, the waste paper is regarded as waste paper regardless of whether it is used or not.

Next, a detailed configuration of the supply unit 10 will be described. Fig. 2 is a schematic diagram showing the configuration of the supply unit. The feeder 10 includes a 1 st feeder 10a for feeding the 1 st paper Pu1 to the defibrator 30 and a 2 nd feeder 10b for feeding the 2 nd paper Pu2 to the defibrator 30. At least one of paper No. 1 Pu1 and paper No. 2 Pu2 is paper Pu having a resin layer. In the present embodiment, the 1 st paper Pu1 and the 2 nd paper Pu2 are supplied from the 1 st supply unit 10a and the 2 nd supply unit 10b to the defibrator unit 30 through the rough grinding unit 20. The 1 st paper Pu1 is, for example, waste paper (paper without a resin layer) such as a 4-sized paper that is currently mainstream in offices, and the 2 nd paper Pu2 is paper with a resin layer.

As described above, the supply section 10 of the present embodiment is configured to supply the 1 st paper Pu1 and the 2 nd paper Pu2, which are different in material, to the defibration section 30 at the same time, defibrate the 1 st paper Pu1 and the 2 nd paper Pu2, and form the sheet Pr from the defibrated product. Therefore, the sheet Pr having different characteristics from the sheet formed only of the paper material having no resin layer can be formed. In this case, the sheet Pr can be produced without using a functional additive for producing the characteristics of the sheet Pr.

Specifically, the paper having a resin layer of the 2 nd paper Pu2 is a water-insoluble paper. Thus, the sheet Pr having hydrophobic properties and low density properties can be molded without using functional additives such as hollow fine particles and/or thermoplastic expandable fine particles. In more detail, the paper material having a resin layer of the 2 nd paper material Pu2 is release paper including cellophane. Here, cellophane can be used, for example, as a constituent member of release paper included in the seal label paper. Furthermore, since a paper material having a resin layer (such as waste paper difficult to process and waste paper difficult to recycle) such as cellophane includes a water-insoluble member, it is insoluble in water and remains as foreign matter in sheet production by a wet process, and these foreign matters are removed. Therefore, in the sheet production by the wet process, a sheet including a member including a resin layer such as cellophane cannot be produced. On the other hand, in the present embodiment, the sheet Pr is produced by using a paper material having a resin layer (such as waste paper difficult to process and waste paper difficult to recycle) such as cellophane paper, though the sheet Pr is produced by a dry process. In particular, the release paper including the roll-shaped cellophane paper after the seal label is peeled off can be directly attached to the supply section 10b of the sheet manufacturing apparatus, and can be easily reused. The following describes a specific configuration of the supply unit 10.

As shown in FIG. 2, the paper shredder includes a 1 st feeder 10a for feeding the 1 st paper Pu1 to the fiber decomposition unit 30 and a 2 nd feeder 10b for feeding the 2 nd paper Pu2 to the fiber decomposition unit 30.

The 1 st feeding unit 10a includes a casing 316, and a loading unit 310 for loading the 1 st paper Pu1 is provided inside the casing 316. Further, pickup roller 313 abuts on the 1 st paper Pu1 located at the uppermost position among the loaded 1 st paper Pu 1. The 1 st paper Pu1 positioned uppermost by the rotation of the pickup roller 313 is fed to the ejection port 318 side provided in the casing 316. The 1 st paper Pu1 fed to the take-out port 318 is discharged from the take-out port 318 by the feed-out roller 314. Further, the discharged 1 st paper Pu1 is conveyed along the guide 324. Thereafter, the 1 st paper Pu1 is further conveyed along the

guides

324 and 352 to the coarse crushing unit 20. Then, the loading unit 310 is raised every time 1 or more of the 1 st sheet materials Pu1 is fed by the pickup roller 313. The position of the loading unit 310 can be moved up and down according to the position of the pickup roller 313 in the vertical direction. Thus, the position of the loading portion 310 is at a position corresponding to the loading amount of the 1 st paper Pu 1. The position of the pickup roller 313 is substantially constant with respect to the feed roller 314. In the illustrated example, the loading unit 310 is connected to the vertical driving shaft 312, and the loading unit 310 can move up and down by rotating the vertical driving shaft 312. The rotation of the upper and lower drive shaft 312 is performed by a motor (not shown) connected to the upper and lower drive shaft 312. For example, a lead screw (lead screw) is used as the vertical driving shaft 312.

The configuration of the 1 st feeding unit 10a is not particularly limited as long as the loaded 1 st paper Pu1 can be fed to the rough crushing unit 20. For example, a spring for biasing the loading portion 310 toward the pickup roller 313 may be provided instead of the vertical driving shaft 312.

The 1 st supply unit 10a is provided with a 1 st sensor 331 and a 2 nd sensor 332. The 1 st and 2

nd sensors

331 and 332 are connected to the control unit 2. The 1 st sensor 331 is provided in the vicinity of the outlet 318 in the case 316 of the 1 st supply unit 10 a. The 1 st sensor 331 detects whether or not the 1 st paper Pu1 is present on the loading unit 310. The form and the installation position of the 1 st sensor 331 are not particularly limited as long as the presence or absence of the 1 st paper Pu1 on the loading unit 310 can be detected. The 2 nd sensor 332 is disposed outside the case 316 and in the vicinity of the extraction port 318 of the 1 st supply unit 10 a. The 2 nd sensor 332 detects whether or not the 1 st paper Pu1 is supplied from the 1 st supply unit 10a (whether or not the 1 st paper Pu1 is discharged from the discharge port 318). The form and the installation position of the 2 nd sensor 332 are not particularly limited, and it is sufficient if it can detect whether or not the 1 st paper Pu1 is supplied from the 1 st supply unit 10 a. The control unit 2 is configured to obtain the supply amount of the 1 st paper Pu1 based on the detection output of the 2 nd sensor 332.

The 2 nd feeding unit 10b feeds the 2 nd paper Pu 2. Paper 2 Pu2 is a release paper for seal label paper, and is, for example, a release paper including a roll of cellophane paper after peeling a seal label by an automatic machine. In the present embodiment, the release paper including the cellophane wound in a roll shape can be conveyed after the seal label is peeled by an automatic machine or the like for applying the seal label to the product. Specifically, the paper feeding device includes a roll unit 350 that disposes the 2 nd paper Pu2 in a roll form on the 1 st feeding unit 10 a.

Further, a conveying roller pair 355 for conveying the 2 nd paper Pu2 is provided, and by rotationally driving the conveying roller pair 355, the 2 nd paper Pu2 in a roll shape fitted to the shaft portion 351 of the reel unit 350 is moved and conveyed along the guide 352. Thereafter, the coarse crushing portion 20 is conveyed along the

guides

352 and 324.

A 3 rd sensor (not shown) for detecting the amount of rotation of one roller 355 of the pair of conveying rollers 355 is disposed, and the 3 rd sensor is connected to the control unit 2. The control unit 2 is configured to obtain the moving amount of the 2 nd paper Pu2 based on the detection output of the 3 rd sensor. In other words, the supply amount of the 2 nd paper Pu2 can be detected.

Next, a method of controlling the sheet manufacturing apparatus will be described. Specifically, a control method related to the supply unit 10 will be described.

In the feeding section 10 of the present embodiment, the feeding amount of the 2 nd paper Pu2 can be controlled so as to be changed with respect to the feeding amount of the 1 st paper Pu 1. In this case, the supply amount of 2 nd paper Pu2 may be changed with respect to the supply amount of 1 st paper Pu1, or the supply amount of 1 st paper Pu1 may be changed with respect to the supply amount of 2 nd paper Pu2, and it is possible to appropriately control that 1 st paper Pu1 and 2 nd paper Pu2 can be changed relatively. The feed amount of 1 st paper Pu1 and the feed amount of 2 nd paper Pu2 are detected by the 2 nd sensor 332 and/or the 3 rd sensor disposed in the 1 st feeding unit 10a and the 2 nd feeding unit 10 b.

For example, in the case of producing a sheet Pr having a relatively low density, the supply amount of the 2 nd paper Pu2 is increased with respect to the supply amount (constant amount) of the 1 st paper Pu 1. That is, the content ratio of Pu2 in the 2 nd paper (paper) in the raw material supplied to the fiber decomposition unit 30 is increased. Thereby, the low-density sheet Pr can be manufactured. The amount of feed of 1 st paper Pu1 may be decreased with respect to the amount of feed (constant amount) of 2 nd paper Pu 2. By doing so, a low-density sheet Pr can also be manufactured.

For example, in the case of manufacturing a sheet Pr having a relatively high density, the supply amount of the 2 nd paper Pu2 is reduced with respect to the supply amount (constant amount) of the 1 st paper Pu 1. That is, the content ratio of Pu2 in the 2 nd paper (paper) in the raw material supplied to the fiber decomposition section 30 is reduced. Thereby, a high-density sheet Pr can be manufactured. The amount of feed of 1 st paper Pu1 may be increased relative to the amount of feed of 2 nd paper Pu2 (a constant amount). By doing so, a high-density sheet Pr can be manufactured.

As described above, according to the present embodiment, the following effects can be obtained.

Waste paper is supplied as 1 st paper Pu1 from the 1 st supply unit 10a, and release paper including cellophane is supplied as 2 nd paper Pu2 from the 2 nd supply unit 10 b. Thus, the sheet Pr having hydrophobic properties and low density properties can be produced without using functional additives such as hollow fine particles and/or thermoplastic expandable fine particles. Further, the release paper including the roll-shaped cellophane can be easily supplied from the 2 nd supply portion 10 b. I.e. can be easily reused. Further, the amount of Pu1 supplied from paper 1 and the amount of Pu2 supplied from paper 2 can be controlled, and sheets Pr having different densities, strengths, hand feeling, and the like can be easily produced.

The present invention is not limited to the above-described embodiments, and various changes, improvements, and the like may be made to the above-described embodiments. The following describes modifications. The modifications may be combined.

In the above embodiment, the 2 nd feeding unit 10b is configured to feed the 2 nd paper Pu2 in a roll form, but the present invention is not limited to this configuration. For example, the 2 nd feeding unit 10b may be configured to feed the 2 nd paper Pu2 in a single sheet (sheet). Fig. 3 is a schematic diagram showing a configuration of a supply unit according to modification 1. As shown in FIG. 3, the feeder 11 includes a 1 st feeder 10a for feeding the 1 st paper Pu1 to the defibrator 30 and a 2 nd feeder 10c for feeding the 2 nd paper Pu2, which is one sheet, to the defibrator 30. Note that, since the configuration of the 1 st supply unit 10a is the same as that of the embodiment 1, the description thereof will be omitted.

The 2 nd supply unit 10c according to the present modification is disposed on the 1 st supply unit 10 a. The 2 nd feeding unit 10c has a casing 346, and a loading unit 340 for loading the 2 nd paper Pu2 is provided inside the casing 346. The pickup roller 343 abuts on the 2 nd paper Pu2 positioned at the uppermost position among the loaded 2 nd paper Pu 2. The rotation of the pickup roller 343 feeds the 2 nd paper Pu2 positioned uppermost to the take-out port 348 provided in the casing 346. The 2 nd paper Pu2 fed to the take-out port 348 is discharged from the take-out port 348 by the feed roller 344. Further, the discharged paper 2 Pu2 is conveyed along the guide 356. Thereafter, the 2 nd paper Pu2 is further conveyed along guide 352 and guide 324 to the coarse crushing section 20. Then, the loading unit 340 ascends every time the pickup roller 343 conveys 1 or more 2 nd sheet materials Pu 2. The position of the loading unit 340 can be moved up and down according to the position of the pickup roller 343 in the vertical direction. Thus, the position of the loading portion 340 is at a position corresponding to the loading amount of the 2 nd paper Pu 2. The position of the pickup roller 343 is substantially constant with respect to the feed roller 344. In the illustrated example, the loading unit 340 is connected to the vertical drive shaft unit 353, and the loading unit 340 is movable vertically by rotation of the vertical drive shaft unit 353. The rotation of the upper and lower drive shaft unit 353 is performed by driving a motor (not shown) connected to the upper and lower drive shaft unit 353. The vertical drive shaft unit 353 is, for example, a lead screw.

The 2 nd supply unit 10c is provided with a4 th sensor 361 and a 5 th sensor 362. The 4 th and 5

th sensors

361 and 362 are connected to the control unit 2. The 4 th sensor 361 is provided near the ejection port 348 in the case 346 of the 2 nd supply unit 10 c. The 4 th sensor 361 detects whether or not the 2 nd paper Pu2 is present on the loading unit 340. The form and the installation position of the 4 th sensor 361 are not particularly limited, and it is sufficient if it can detect whether or not the 2 nd paper Pu2 is present on the loading unit 340. The 5 th sensor 362 is disposed outside the case 346 and near the outlet 348 of the 2 nd supply unit 10 c. The 5 th sensor 362 detects whether or not the 2 nd paper Pu2 is supplied from the 2 nd supply unit 10c (whether or not the 2 nd paper Pu2 is discharged from the take-out port 348). The form and the installation position of the 5 th sensor 362 are not particularly limited, and it is sufficient if it can detect whether or not the 2 nd paper Pu2 is supplied from the 2 nd supply unit 10 c. The control unit 2 is configured to obtain the supply amount of the 2 nd paper Pu2 based on the detection output of the 5 th sensor 362. Even with such a configuration, the same effects as those described above can be obtained.

In the above embodiment, the 1 st paper Pu1 fed from the 1 st feeding unit 10a and the 2 nd paper Pu2 fed from the 2 nd feeding unit 10b are fed between the

guides

324 and 352 while being overlapped with each other, but the present invention is not limited to this configuration. The 1 st paper Pu1 supplied from the 1 st supply unit 10a and the 2 nd paper Pu2 supplied from the 2 nd supply unit 10b may be provided with conveyance paths, respectively, and the 1 st paper Pu1 and the 2 nd paper Pu2 may be conveyed separately. Even with such a configuration, the same effects as those described above can be obtained.

(modification 3) in the above embodiment, the 1 st paper Pu1 was used as waste paper, and the 2 nd paper Pu2 was used as paper having a resin layer (release paper including cellophane) and the invention is not limited thereto. For example, both paper 1 Pu1 and paper 2 Pu2 may be paper having a resin layer. In this case, as paper 1 Pu1 and paper 2 Pu2, for example, different types of paper are used from black and white photographic paper, color photographic paper, water repellent paper, thermal paper, and the like, in addition to release paper including cellophane. By doing so, the sheet Pr having different densities, strengths, hand, and the like can be formed.

(modification 4) in the above embodiment, the configuration is such that: the supply section 10 is provided with 2 supply sections, i.e., the 1 st and 2

nd supply sections

10a and 10b, and can supply 2 types of paper, i.e., the 1 st and 2 nd paper Pu1 and Pu 2. For example, 3 or more supply units may be provided, and 3 or more types of paper may be supplied. If this is done, the variation can be increased with respect to the characteristics of the sheet Pr.

Claims

1. A sheet manufacturing apparatus is characterized by comprising:

a 1 st feeding unit for feeding a 1 st paper;

a 2 nd feeding unit for feeding the 2 nd paper;

a rough crushing unit configured to simultaneously feed the 1 st paper and the 2 nd paper from the 1 st feeding unit and the 2 nd feeding unit and to cut the 1 st paper and the 2 nd paper;

a defibration unit configured to defibrate the 1 st paper material and the 2 nd paper material cut by the rough grinding unit in the atmosphere; and

a forming section for forming a sheet from at least a part of the decomposed fiber product subjected to the decomposition treatment by the decomposition section,

at least one of the 1 st paper and the 2 nd paper is a paper having a resin layer,

the 1 st paper and the 2 nd paper are papers different in raw material from each other.

2. The sheet manufacturing apparatus according to claim 1, wherein:

the paper material having a resin layer is a water-insoluble paper material.

3. The sheet manufacturing apparatus according to claim 2, wherein:

the paper material having a resin layer is a release paper comprising cellophane.

4. The sheet manufacturing apparatus according to any one of claims 1 to 3, wherein:

the paper feeding device is provided with a control part capable of changing the feeding amount of the 2 nd paper relative to the feeding amount of the 1 st paper.

5. A sheet manufacturing method characterized by:

feeding paper 1 and paper 2 simultaneously;

cutting the 1 st and 2 nd paper materials supplied;

subjecting the cut 1 st and 2 nd papers to defibration in the atmosphere;

forming a sheet material from at least a part of the decomposed product of the fibers after the decomposition treatment,